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Warren 48x48 window modern promotional doors windows tempered glass sound insulation lock sliding windows Residential Windows system LVDUN bifold glass window thermalPlace of Origin: Guangdong, China Brand Name: Warren Model Number: Engineer Master Architect Energy series Frame Material: Aluminum Alloy Opening Pattern: Horizontal Screen Netting Material: Stainless steel Warranty: More than 5 years Material: Stainless steel Feature: Magnetic Screen Open Style: Sliding Function: Heat Insulation After sale Service: Return and Replacement, Onsite Inspection, Online technical support, Onsite Training, Onsite